enoent
enoent-
ENOENT & No such file was found or the specified path name doesn 't exist .
ENOENT：没有找到这样的文件，或者指定的路径名不存在。
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For example , a system call returning with Err # 2 ENOENT ( No such file or directory ) would indicate that the command is expecting to find a file or directory but can 't and subsequently fails .
例如，如果一个系统调用返回Err2ENOENT（没有这样的文件或目录），就表示此命令要寻找一个文件或目录，但是无法找到，因此运行失败。